Natural Gas Reference Guide

Transcription

1 Natural Gas Reference Guide

2 NICOR GAS NATURAL GAS REFERENCE GUIDE A guide to industry code specifications and guidelines Always check your local building code department to ensure correctness of information and that all projects are within proper building code specifications. In the event of a natural gas emergency contact Nicor Gas immediately at Nicor4u ( ) or your local fire department. Call us at Nicor4u ( ) for: l Additional copies of the guide, ext l Questions concerning information within this guide, ext Or if you re calling for natural gas service for new construction, GAS-6228 Visit us on our web site at i

3 INDEX NICOR GAS NATURAL GAS REFERENCE GUIDE PAGE GAS APPLIANCE INPUT TABLE - 2 LB METER TIMING FOR GAS INPUTS LOW PRESSURE TWO POUNDS PRESSURE CAPACITY OF ORIFICES PRESSURE EQUIVALENTS INCHES OF WATER TO MERCURY POUNDS TO OUNCES CAPACITY OF FUEL RUNS LOW PRESSURE PIPE LOW PRESSURE TUBING LP CSST PSI PIPE PSI TUBING PSI CSST HEAT CONTENT OF GAS AND OIL SPECIFICATION FOR THREADING PIPE DRILL SIZES FOR PIPE TAPS MAXITROL REGULATOR HOW TO USE A U-GAUGE LOCATION COLORS ii

4 APPROXIMATE GAS INPUT OF GAS APPLIANCES IN CUBIC FEET PER HOUR Appliances Input Domestic Gas Range 65 Storage Water Heater - 30 Gallon 45 Storage Water Heater Gallon 55 Instantaneous Water Heater 2 Gallon Min. Capacity: Gallon Gallon 428 Steam Boiler - per Horsepower (Commercial) 50 Restaurant Range 4 Top Burners - 2 Ovens Top Burners Ovens 240 Clothes Dryers 26 Grills 35 Yard Lights 2 Air Conditioning Per nameplate rating Pool Heater or manufacturer s Gas Logs and Log Lighters recommendations 1

5 GAS APPLIANCE INPUT TABLE APPROXIMATE GAS INPUT OF GAS APPLIANCES IN CUBIC FEET PER HOUR Appliances Input Space Heating Equipment (Conversion Burners) Space Heating Equipment (Gas Designed) Pipe size according to anticipated load. Burner must never be adjusted to exceed burner rating. Per Nameplate rating or manufacturer s recommendations. 2

6 METER TIMING TABLE FOR GAS INPUTS AT LOW PRESSURE METERING GAS RATE CUBIC FEET PER HOUR Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft , , , , , , , , ,

7 METER TIMING TABLE FOR GAS INPUTS AT LOW PRESSURE METERING GAS RATE CUBIC FEET PER HOUR Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft

8 METER TIMING TABLE FOR GAS INPUTS AT LOW PRESSURE METERING GAS RATE CUBIC FEET PER HOUR Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft

9 METER TIMING TABLE FOR GAS INPUTS AT LOW PRESSURE METERING GAS RATE CUBIC FEET PER HOUR Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft

10 METER TIMING TABLE FOR GAS INPUTS AT 2 LBS. METERING PRESSURE Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft , , , , , , , , , , ,

11 METER TIMING TABLE FOR GAS INPUTS AT 2 LBS. METERING PRESSURE Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft

12 METER TIMING TABLE FOR GAS INPUTS AT 2 LBS. METERING PRESSURE Seconds For One Size of Test Dial Revolution 1/2 cu. ft. 1 cu. ft. 2 cu. ft. 5 cu. ft

13 CAPACITY OF ORIFICES IN BTU ORIFICE PRESSURE INCHES OF WATER SIZE DRILL 3 3-1/ / / /

14 CAPACITY OF ORIFICES IN BTU ORIFICE PRESSURE INCHES OF WATER SIZE DRILL 3 3-1/ / / / / / /

15 CAPACITY OF ORIFICES IN BTU ORIFICE PRESSURE INCHES OF WATER SIZE DRILL 3 3-1/ / / / / A / B C D /4E F G / H

16 CAPACITY OF ORIFICES IN BTU ORIFICE PRESSURE INCHES OF WATER SIZE DRILL 3 3-1/ I J K / L M / N / O P / Q R / S T / U / V W / X Y / / / / / / / / /

17 CAPACITY OF ORIFICES IN BTU ORIFICE PRESSURE INCHES OF WATER SIZE DRILL 3 3-1/ / / / / / / / / / / / / /

18 PRESSURE EQUIVALENTS Equivalent Inches Equivalent Inches Water Mercury Water Mercury

19 PRESSURE EQUIVALENTS Pressure Per Square Inch Pressure Per Square Inch Pounds Ounces Pounds Ounces

20 NATURAL GAS Capacity of Low Pressure Fuel Runs In Cubic Feet of Gas Per Hour MAXIMUM ALLOWABLE DEMAND BY SIZE AND LENGTH SIZE OF PIPE* 1/2 3/ /4 1-1/ / SP. GR PRESSURE DRP 0.50 WATER * LENGTH IN FEET (4 ELBOWS INCLUDED) NOTE: For Straight Runs (No Elbows Refer to Pamphlet #54). 17

21 MAXIMUM CAPACITY OF SEMIRIGID TUBING CUBIC FEET PER HOUR.65 SPECIFIC GRAVITY 0.3 WATER COLUMN PRESSURE DROP OUTSIDE DIAM. INCHES LENGTH OF TUBING IN FEET / / / / /

22 MAXIMUM CAPACITY OF CORRUGATED STAINLESS STEEL TUBING IN CUBIC FEET OF GAS PER HOUR FOR: Gas Pressure: 5-7 inches Water Column Pressure Drop: 0.5 inches Water Column (Based in 0.60 specific gravity gas)* Length of Tubing Size Tubing Run (3/8) (1/2) (3/4) (1) 5 feet feet feet feet feet feet feet feet feet feet feet feet feet feet feet * Table includes losses for four 90 degree bends and two end fittings. To compute flow capacity for tubing runs with a larger number of bends and/or fittings, add the appropriate number of feet to the actual run length using the following formula. L =1.3 (n) L = Number of feet to be added to actual run length n = Number of bends and/or fittings over six. 19

23 SIZING CHART FOR TWO POUND PRESSURE PIPE Cfh at 1-1/2 Pounds Pressure Drop -.65 Gravity Gas - Nominal Pipe or I.D. Tubing Size Length in Ft. 1/4 3/8 1/2 5/8 3/ /4 1-1/ / M 310M M 220M M M M M O.D. Tubing 3/8 1/2 5/8 3/4 7/8 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 4-1/8 Size Use this chart when metering or reduced pressure is 2 PSIG. Minimum inlet pressure to pounds-toinches regulator will be 1/2 pound or 14 inches. 20

24 FLOW CAPACITY TABLE FOR TUBING - 2 p.s.i. MUELLER FORMULA USED PIPE INLET PRESSURE = 3.00 PRESSURE DROP = 0.50 SPECIFIC GRAVITY = 0.60 INSIDE DIAMETER OF TUBING (INCHES) LENGTH 3/8 fi 5/ /8 FT

25 MAXIMUM CAPACITY OF CORRUGATED STAINLESS STEEL TUBING IN CUBIC FEET OF GAS PER HOUR FOR: Gas Pressure: 2 psi Pressure Drop: 1.5 psi Including losses of a Maxitrol 325-5A Regulator (Based in 0.60 specific gravity gas)* Length of Tubing Size Tubing Run (3/8) (1/2) (3/4) (1) 5 feet feet feet feet feet feet feet feet feet feet feet feet feet feet feet * Table includes losses for four 90 degree bends and two end fittings. To compute flow capacity for tubing runs with a larger number of bends and/or fittings, add the appropriate number of feet to the actual run length using the following formula. L =1.3 (n) L = Number of feet to be added to actual run length n = Number of bends and/or fittings over six. 22

26 MEASUREMENT OF HEAT CONTENT TYPE OF FUEL B.T.U. PER UNIT OF MEASURE Natural Gas...1,032 Per Cu. Ft. Mixed Gas Per Cu. Ft. Manufactured Gas 530 Per Cu. Ft. Propane...2,500 Per Cu. Ft. 91,500 Per Gal. Butane...3,000 to 4,000 Per Cu. Ft. 102,000 Per Gal. #1 Fuel Oil...136,000 Per Gal. #2 Fuel Oil...138,000 Per Gal. #3 Fuel Oil...141,000 Per Gal. #4 Fuel Oil...145,000 Per Gal. #5 Fuel Oil...148,000 Per Gal. #6 Fuel Oil...152,000 Per Gal. Electric...3,414 Per K.W.H. Stoker Coal...Av. 25,000,000 Per Ton. 1. British Thermal Unit (BTU) is the amount of heat required to raise the temperature of one pound of pure water one degree Fahrenheit (59.5 to 60.5oF.) 2. Kilowatt-Hour (KWH) is the amount of energy produced by expending 1 kilowatt for 1 hour. The kilowatt (1000 watts) is used in electrical work as a convenient unit of power measurement. 3. Therm-Measurement of heat- 100,000 BTU 4. Gallon (U.S.)-231 Cu. In. 23

27 SPECIFICATIONS FOR THREADING PIPE Diameter of Pipe - Inches Actual Approximate Length Approximate No. Size Outside Of Threaded Portion Of Threads Pipe Size (Inches) To Be Cut 1/ / / / /4 10 3/ / / / / / / / / /

28 DRILL SIZES FOR PIPE TAPS Size Number Of Tap Of Threads Diam. In Inches per Inch Of Drill 1/ /32 1/4 18 7/16 3/ /64 1/ /32 3/ / /2 1-5/32 1-1/4 11-1/2 1-1/2 1-1/2 11-1/2 1-49/ /2 2-3/16 2-1/ / /16 3-1/ / /16 4-1/ / / /16 25

29 GAS APPLIANCE REGULATORS BY MAXITROL 325-3, 325-5, 325-5H MAXIMUM INLET PRESSURES: 325-3, 325-5, 325-5H psi EMERGENCY EXPOSURE LIMITS: 325-3, 325-5, 325-5H psi Inlet side only AMBIENT TEMPERATURE LIMITS: 325-3, 325-5, 325-5H to 205F VENTING: Model /8NPT & 325-5H Models /8NPT GASES: Natural, manufactured, mixed liquefied petroleum or LP gasair mixture. MOUNTING: The & are suitable for multipoise mounting. When using the 12A09 vent limiting device, the must be mounted in the upright position for best performance. The 325-5H should be mounted in upright position only. NOTE: All Maxitrol appliance regulators should be installed and operated in accordance with Maxitrol s Safety Warning Bulletin. These regulators provide no downstream overpressure protection in the event of failure. They should not be used if the appliance controls downstream will not safely contain gas when exposed to supply pressure. 26

30 The 325 series is a pounds to inches regulator for use on residential, commercial, and industrial applications where adequate inlet pressures are available. They feature a high leverage valve linkage to deliver positive dead-end lock-up and precise regulating control from full flow down to tiny pilot flows. The series, a high performance type, can be used as a single stage regulator reducing from pounds pressure to normal burning pressure, or as a first stage regulator of a 2-stage system on equipment already fitted with an appliance regulator. The 325-5H is a modified version of the Fitted with an orifice plate and retainer in the vent outlet, it permits the utilization of greater capacities without sacrificing performance. The self-aligning valve, on all models, is made of Buna-N rubber. Valve resiliency helps provide full shut-off even if minute line impurities get on valve seat. Housings are rugged aluminum die castings and all internal parts are carefully selected and corrosion resistant. The diaphragms are of high quality supported synthetic rubber compounds. As an optional accessory, the model offers an automatic vent limiting device (for use with maximum inlet pressure of 5 psi LP). It eliminates the need to run vent piping to a safe area. In the event of a diaphragm rupture, gas escapement is limited within ANSI standards level. For use on commercial ranges, baking ovens, large water heaters, boilers, unit heaters, steam generators, and furnaces. The & models are widely accepted with 2 & 5 psig house piping systems. 27

31 DIMENSIONS - in inches DIMENSIONS AND PRESSURE DROP Model Number Call-Outs and Swing Radius A B C D /2 4-1/4 3-7/8 5/ /8 5-1/4 5-7/8 5-7/16 15/ H 4 7/8 5-1/4 5-7/8 5-7/16 15/16 SPRING SELECTION CHART - inches w.c. unless noted Model Number and Standard Spring Other Springs Available to psi to psi 325-5H 2 to psi CAPACITIES - expressed in ft /h sp gr gas Model Number Pressure Drop and Pipe Size fi psi fl psi 1 psi /8 x 3/ fi x fi fi x fi fl x fl x fi psi 1 psi 2 psi 3 psi 325-5H fi x fi fl x fl x

32 DIMENSIONS AND PRESSURE DROP Specifications Mounting: Mount with gas flow direction as marked on bottom casting. Accessories: If using the 12A09 automatic vent limiting device (325-3 Only), the regulator should be mounted in an upright position. This permits the device to achieve quick response on the closing cycle. No hazard exists due to other mounting planes, however, and leakage rate is still limited. Lockup Characteristics: Positive shut-off type. With adequate venting, outlet pressure rise is maintained within utility accepted standards under static conditions of no gas flow. Vent: Model vertical vent boss tapped 1/8 NPT Model vertical vent boss tapped 3/8 NPT Operating Limits: Max. Operating inlet pressure psi Max. Emergency exposure pressure (inlet side only)... 65psi May not regulate satisfactorily at this pressure but will suffer no internal damage. Ambient Limits: Minimum F Maximum F Gasses: For natural, manufactured, mixed, liquefied petroleum 29

33 Be sure the rubber hose is not kinked shut; if it is, the reading will not be accurate. 5. Read each side from the zero and add the two readings. The readings should be made to the nearest tenth of an inch. NOTE: The top of the column of water in each side is crescent shaped downward and is called the meniscus. Always read the lower edges of the water meniscus, keeping the eyes level with the bottom of the curve for accurate readings. 31

34 UTILITY SERVICE COLORS Gas, oil or petroleum high VISIBILITY YELLOW Electric FIRE PROTECTION RED Communication, telephone, TV ALERT ORANGE Potable water precaution BLUE Sewer SAFETY GREEN Proposed Area of Excavation SAFETY WHITE CALL JULIE Hours (Two Working Days) Before You Dig 32

35 NOTES

36 NOTES

37 Nicor Gas P. O. Box 190 Aurora, IL First Class U.S. Postage Paid Aurora, IL Permit No. 64